Racetrack-shape fixed field induction accelerator for giant cluster ions

A novel scheme for a racetrack-shape fixed field induction accelerator (RAFFIA) capable of accelerating extremely heavy cluster ions (giant cluster ions) is described. The key feature of this scheme is rapid induction acceleration by localized induction cells. Triggering the induction voltages provided by the signals from the circulating bunch allows repeated acceleration of extremely heavy cluster ions. The givenRAFFIAexample is capable of realizing the integrated acceleration voltage of 50 MV per acceleration cycle. Using 90 degrees bending magnets with a reversed field strip and field gradient is crucial for assuring orbit stability in the RAFFIA.